Other
Scientific paper
Jul 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008hst..prop11582b&link_type=abstract
HST Proposal ID #11582. Cycle 17
Other
Scientific paper
A significant fraction of energy emitted by galaxies at redshifts when their stars were forming most vigorously, and when their blackholes were growing most powerfully emerges at far-infrared {IR} wavelengths. The fraction of this energy generated by the most extreme and luminous objects is also much larger than the equivalent fraction at optical wavelengths. Many of the most luminous far-IR sources have been located precisely and unambiguously using deep radio, Spitzer and optical observations, and have spectroscopic identifications using the largest ground-based telescopes. Surprisingly, however, the spectra of most of these heavily dust-enshrouded galaxies show prominent Lyman-alpha emission. We propose to observe five of the brightest examples at z 2-3 in re-activated ACS ramp filters, to resolve the spatial distribution of this line emission on fine kpc scales, in order to contrast and compare with the underlying ultraviolet {UV} continuum. Precise spectroscopic redshifts and the unique rest-UV resolution of HST are both essential to reveal the escape and generation of Lyman-alpha photons in the dusty ISM of these extreme galaxies. There is no other way to trace the detailed spatial distirbution of the most excited gas in a galactic wind, along with emission from less-massive star-forming galaxies in associated groups. The targets have available HST-resolution ground-based near-IR AO imaging and arcsec-scale images in CO from ground-based mm-wave interferometers, which provide context for spatial structure of evolved stars and the ISM. The interplay between restframe UV emission and the ISM in these galaxies has important consequences for understanding the origin of the prodigous luminosity of these systems, and for future observations with JWST and ALMA.;
No associations
LandOfFree
The spatial distribution of radiation in the complex ISM of distant ultraluminous galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The spatial distribution of radiation in the complex ISM of distant ultraluminous galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The spatial distribution of radiation in the complex ISM of distant ultraluminous galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1320212